The sternum is formed by three bones; the manubrium, the sternal body and the xiphoid process (xiphisternum). These bones articulate together by hyaline cartilage with a fibrocartilaginois disc to form the anterior and midline portion of the chest wall.
The sternum has many articulations, where the manubrium articulates with the first rib and the clavicle while the sternal body articulates with the second to seventh ribs as well as the costal cartilages.
This 3D model was created from the file ABD_LYMPH_001
The original CT examination can be reviewed at:

The chest wall (thoracic cage) is composed by twelve pairs of ribs laterally and the sternum anteriorly. The ribs are attached to the dorsal vertebrae (thoracic spine) posteriorly and along their costal cartilage to the sternum.
The thoracic cage main function is to protect the vital chest organs such as the heart and lungs.
There are five muscles that make up the thoracic cage; the intercostal (external, internal and innermost), subcostals, and transversus thoracis.
This model ready for medical 3D printing was created from the file ABD_LYMPH_001
The original CT examination can be reviewed at:
The 3D bone model created from this scan can be reviewed at:

The chest wall (thoracic cage) is composed by twelve pairs of ribs laterally and the sternum anteriorly. The ribs are attached to the dorsal vertebrae (thoracic spine) posteriorly and along their costal cartilage to the sternum.
The thoracic cage main function is to protect the vital chest organs such as the heart and lungs.
There are five muscles that make up the thoracic cage; the intercostal (external, internal and innermost), subcostals, and transversus thoracis.
The CT scan is derived from the file ABD_LYMPH_001
The STL file bone model for medical 3D printing created from this scan can be reviewed at:
The STL file muscle model for medical 3D printing created from this scan can be reviewed at:

The chest wall (thoracic cage) is composed by twelve pairs of ribs laterally and the sternum anteriorly. The ribs are attached to the dorsal vertebrae (thoracic spine) posteriorly and along their costal cartilage to the sternum.
The thoracic cage main function is to protect the vital chest organs such as the heart and lungs.
There are five muscles that make up the thoracic cage; the intercostal (external, internal and innermost), subcostals, and transversus thoracis.
This 3D model was created from the file ABD_LYMPH_001
The original CT examination can be reviewed at:
The 3D muscle model created from this scan can be reviewed at:

There are twelve pairs of ribs which are separated by the intercostal spaces. The upper 7 ribs show increase on length progressively while the lower 5 ribs show gradual decrease in length.
The ribs could be:
true the first 7 ribs that attach to the sternum directly
false from 8th to 10th that attach to the sternum through costal cartilage
floating the 11th and 12th with no articulation to the sternum
The CT scan is derived from the file STS_040
The 3D bone model created from this scan can be reviewed at: